javascript - 获取所选单选按钮的组合以在单击按钮时显示消息

Question

我有多种单选按钮，根据选择它们的组合，当用户对输入感到满意时按下按钮时，我希望在 span 元素中显示一条消息。然而，它并没有实现这一点。这是我的代码到目前为止的样子:

HTML:

<p>Select your first colour:</p>
<input type="radio" id="red" name="primary" value="0">Red<br>
<input type="radio" id="yellow" name="primary" value="1">Yellow<br>
<input type="radio" id="blue" name="primary" value="2">Blue<br>

<p>Select your second colour:</p>
<input type="radio" id="green" name="other" value="0">Green<br>
<input type="radio" id="white" name="other" value="1">White<br>
<input type="radio" id="purple" name="other" value="2">Purple<br>

<input type="button" id="mixColours" value="Mix!"><br />
<span id="colourResult"> </span><br /><br />

Javascript:

var $ = function(id) {
return document.getElementById(id);
};

var red = $("red");
var yellow = $("yellow");
var blue = $("blue");
var green = $("green");
var white = $("white");
var purple = $("purple");

var mixColours = function mixColours () {

if (red.checked && green.checked) {
    $("colourResult").innerHTML = "You made Yellow!";
}
else if (red.checked && white.checked) {
    $("colourResult").innerHTML = "You made Pink!";
}
else if (red.checked && purple.checked) {
    $("colourResult").innerHTML = "You made Mauve!";
}

if (yellow.checked && green.checked) {
    $("colourResult").innerHTML = "You made Yellow!";
}
else if (yellow.checked && white.checked) {
    $("colourResult").innerHTML = "You made Light Yellow!";
}
window.onload = function () {
    $("mixColours").onclick = mixColours;

或在此处使用 jsfiddle:http://jsfiddle.net/e2yjerm3/

如果有人能指出我的错误并帮助我(或引导我帮助文章)，我将不胜感激。我根据教程等创建了这个。我读过，但我似乎误入歧途了。

Answer 1

演示 - http://jsfiddle.net/victor_007/e2yjerm3/3/

2 } } 最后丢失了

var $ = function(id) {
  return document.getElementById(id);
};

var red = $("red");
var yellow = $("yellow");
var blue = $("blue");
var green = $("green");
var white = $("white");
var purple = $("purple");

var mixColours = function mixColours() {

  if (red.checked && green.checked) {
    $("colourResult").innerHTML = "You made Yellow!";
  } else if (red.checked && white.checked) {
    $("colourResult").innerHTML = "You made Pink!";
  } else if (red.checked && purple.checked) {
    $("colourResult").innerHTML = "You made Mauve!";
  }

  if (yellow.checked && green.checked) {
    $("colourResult").innerHTML = "You made Yellow!";
  } else if (yellow.checked && white.checked) {
    $("colourResult").innerHTML = "You made Light Yellow!";
  }

}; /* this */
window.onload = function() {
  $("mixColours").onclick = mixColours;
}; /* this */

<p>Select your first colour:</p>
<input type="radio" id="red" name="primary" value="0">Red
<br>
<input type="radio" id="yellow" name="primary" value="1">Yellow
<br>
<input type="radio" id="blue" name="primary" value="2">Blue
<br>
<p>Select your second colour:</p>
<input type="radio" id="green" name="other" value="0">Green
<br>
<input type="radio" id="white" name="other" value="1">White
<br>
<input type="radio" id="purple" name="other" value="2">Purple
<br>
<input type="button" onclick="mixColours()" id="mixColours" value="Mix!">
<br />
<span id="colourResult"> </span>

<br />
<br />